Start by observing the complaint level that's currently endemic in the forums. Sometimes, Blogger will cause their own problems (yes, this is known to happen), and you'll see a flood of complaints. Here, it is helpful to be familiar with the normal complaint level.
If you wait a while, say an hour or maybe a day, and don't see an increasing flood of complaints about comments, maybe the problem is with your blog, or with your computer (your readers computers).

Check the "Blog Posts" wizard. Look at the Post Page Options, and the comments link caption option (the 4th option). Make sure that option is enabled - and make sure that the caption hasn't been changed to something arbitrary, blank, or outrageous.

Edit the individual posts, and check the "Reader comments" setting, under "Post settings" - Options. If you disabled comments, for a single post, all subsequent posts will have comments disabled also - until you reset the per post setting.

Dude, hit me with a comment!

Hi, sorry to bother you! After I have accidentally clicked on the 'Link to post' button in other blogger's blog, I found I failed to view all the comments from my fellow bloggers in my full-page comment form! However I still receive comment notification from my fellow bloggers through email... please help!

I notice that on your blog in the other pages, you have what appears to be multiple posts on these static pages. How did you do this? I notice after each "post" there are tags and comments. I cannot do this on my pages. Thank you!Tami

I would also like my comments to show up like yours. I have a little blip that says 3 comments which you have to click on to read them everyone else's comments are right there to be read right below the post. It shouldn't be that hard to do! Nancy

We're still experiencing commenting problems that seems more to do with Blogger bugs than anything our readers or writers are doing wrong.

Readers from different continents (North America, Europe, Africa) report problems with multiple browsers: IE, Firefox, and Opera. We don't know of any reports involving Safari, but that may be coincidence. Many reporting errors are seasoned bloggers themselves.

I can't reply or comment on my own blog. I try to. I type the words, choose an ID, and hit enter, and it just refreshes back to the comment window, never leaving my comment. It only seems to happen on my blog since 7/11/14. No settings have been altered. I do not have G+ comments enabled.

Not that I am disagreeing with you, but if it's a cookie issue, how is it I can comment on other blogs, like this one. Wouldn't the cookie issue block me from commenting then, and showing up as me, as well?

The Full Page form is least vulnerable (not totally invulnerable), of the 3 forms. Embedded, Full Page, and Pop Up forms are all vulnerable, to some extent.

But the problem also involves the clients (ie, the blog readers). Every different computer has a different combination of security accessories - and every different security accessory will have its own filters - and be subject to updates, by the provider. And every different filter will be triggered by different components in Blogger comments forms.